초록 ▼

A system controlled by digital computers includes first and second dissimilar digital computers which are distinctly programmed to generate respective nominally identical control signals alternately. The computer alternately generates limiting values for the control signals, each limiting value bein

A system controlled by digital computers includes first and second dissimilar digital computers which are distinctly programmed to generate respective nominally identical control signals alternately. The computer alternately generates limiting values for the control signals, each limiting value being generated in a different computer from that in which the control signal was generated. An unacceptable difference between the control signals and their limiting values causes control of the system to be switched to a third computer, which may be an analog computer. The comparisons are also made between the control signals themselves and between the limiting values themselves, and unacceptable differences may cause control to revert to the third computer or alternatively to be transfered to an arrangement generally similar to that set forth above.

대표청구항 ▼

A control system which is primarily controlled by a digital computer, said system comprising: (a) an apparatus responsive to input control signals, (b) and a computer arrangement comprising: (1) first and second digital computers which have different hardware designs and which are programmed with re

A control system which is primarily controlled by a digital computer, said system comprising: (a) an apparatus responsive to input control signals, (b) and a computer arrangement comprising: (1) first and second digital computers which have different hardware designs and which are programmed with respective first and second control programs which in turn are repsonsive to operating conditions of said apparatus for providing first and second substantially identical output signals; (2) a third computer responsive to selected ones of said operating conditions for providing third output signals; (3) switching means for causing said input control signals to be supplied either by said first and second output signals or by said third output signals; (4) said second and first computers also being programmed with respective first and second limiter programs which: (A) generate limiting values for said first and second output signals respectively, (B) and provide first and second output indicating signals if either of said first and second output signals exceeds its respective limiting value by more than a predetermined amount; (5) said switching means being responsive to said first or said second indicating signals for causing said third output signals to supply said input control signals; (6) and a timer device for generating time signals for controlling operation of the first and second computers so that said first control program and said first limiter program operate concurrently, and said second control program and said second limiter program operate concurrently, and said first programs are alternated with said second programs.